Conveyor-belt connection



Jan. 19, 1965 STQLZ 3,165,800

CONVEYOR-BELT CONNECTION Filed April 11, 1965 9 PE/OE ART F 119- PBIOE AB T Jn van/0r:

United States Patent 3,165,800 CONVEYOR-BELT CONNECTION Hermann Stolz, Mnhlheim (Main), Germany, assignor to Curt Matthaei, Offenbach (Main), Germany Filed Apr. 11, 1963, Ser. No. 272,280 Claims priority, application Germany, Apr. 26, 1962, M 52 640 3 Claims. (CI. 24-33 The present invention relates to an improvement of such a conveyor-belt connection and its purpose is to increase the strength of such connections. This is particularly important for belts of high-strength, synthetic fibres with strengths above 1000 kg. per cm. of belt width, because sufiiciently high strength values could not be achieved in these belts with the wire-hook connections hitherto known.

In a conveyor-belt connection by means of V-shaped Wire hooks, wherein the tips of one end of the limbs are bent round transverse bridge portions uniting the hooks into a row at the other ends of the limbs, thepurpose of the invention is achieved as a result of the fact that each V-hook has on its clawless limb a transverse bridge portion which is formed by lateral bending and which bears against the neighbouring V-hook at such a short distance therefrom that the alternating eyes at the apices of the hooks lie close together laterally on thecoupling pm.

One embodiment of the invention is illustrated by way of example and purely diagrammatically in FIGS. 1-4 of the accompanying drawings, in which:

FIGURE 1 is a side view of the wire hook according to the invention;

FIGURE 2 is a plan view of a row of. hooks;

FIGURE 3 is a-vertical section through a conveyorbelt connection according to the invention;

FIGURE 4 is a plan view corresponding to FIG- URE 3; i a

Also, in the accompanying drawings,

FIGURE 5 is a plan view of a row of prior art hooks, and

FIGURE 6 is a plan view of a conveyor-belt connection formed of said prior art hooks.

The conveyor-belt connection consists of the two belt ends 1 and 2 and a coupling pin 3 which passes through the alternating eyes 21, 22 at the apices of the wire hooks 4, 5.

In the embodiment shown in the US. Patent 'No. 3,071,830, the individual V-shaped wire hooks are constructed in the form of double hooks, the limbs 11 of which, FIG. 5, are connected to one another by means of a transverse bar 12 which is welded on. .The limbs 13 have long claws 14, which, when pressed in, engage,

' in the usual manner, round the transverse bridge portion 'ice 15 forming the eye of each double wire hook. Spaced apart from the claws 14 on the limbs 13 are welded auxiliary claws 16 which engage round the transverse bar 12 in the manner shown in FIGURE 6 after being pressed in. I

V In the hooks according to the invention, each V-shaped wire hook likewise has a shank or limb v33 with a long claw 34 and an auxiliary claw 36 which is welded on.

The clawless shank or limb of each V-hook lies generally in the same plane as shank 33. An intermediate portion 310: is slanted out of this plane and continued in an outer portion 31b parallel to said plane but spaced apart therefrom and terminating in a bridge portion 35 extending toward said plane and ending substantially within the same. The bridge portion bears against the neighbouring V-hook (FIGURE 2). The transverse bridge portions 35 may be welded to the adjacent hookless limbs 31. With a suitable formation of the bend, the Wedding may be omitted and the individual V-wire hooks in a strip of hooks are then held together only by a transverse rod 32 which is welded on.

In the conveyor-belt connection as shown in US. Patent No. 3,071,830, the spacing of the tips of the hooks in the belt amounts to 7 mm. With this spacing, a wire thickness of 2.4 mm. at the most can be selected without the spacing of the tips, which penetrate through, become ing irregular. Thiscorresponds to a ratio of 1:2.92'of wire thickness to spacing.

As a result of the construction of the conveyor-belt connection according to the invention, it is possible for the transverse bridge portions 35 to bear against the adjacent V-hooks at such. a short distance apart that the alternating eyes 21,22 at the apices touch each other laterally on the coupling pin'3 (FIGURE 4). By this means, it is .possible to reduce the ratio of wire strength to spacing to 1:22. As a result, not only are 25% more points available for the anchoring of the wire hooks in the ends of the belt but also the cross-section of the connection at the eyes 21, 22 of the hooks is likewise increased by 25%. Thus, with the conveyor-belt connec tion according to the invention, connections with greater strength can be produced in comparison with the socalled quadruplet hooks according to the US. Patent No. 3,071,830. With the. embodiment illustrated, for example, the strength values can be increased by about 25%.

Having now particularly described my invention what I desire to secure by Letters Patent of the US. and what I claim is:

1. A connector for a belt, said connector comprising a plurality of generally V-shaped connector elements, each of said elements having two shanks lying substantially in a common plane, one'shank of each element terminating-in a prong extending inwardly towards the other shank and substantially lying in said common plane and said other shank having an inner portion lying within said plane, an intermediate portion extending out of said plane and an outer. portion lying parallel to said-plane but spaced apart therefrom and terminating in a bridge portion extending toward said plane and ending substantially 3 4 tion and define a substantially straight continuous line References Cited by the Examiner transverse of said planes. UNITED A A 2. A connector according to claim 1 wherein the tip of ST TES P TENTS each of said bridge portions is fixedly secured to the next 2,912,732 11/59 Stolz et a1. 24-33 adjacent bridge portion. 5 3,071,830 1/62 Stolz 2433 3. A connector according to claim 1 wherein a cross bar extends across the outer portions of said other shanks DONLEY J. STOCKING, Primary Examiner. and is fixedly secured thereto. 

1. A CONNECTOR FOR A BELT, SAID CONNECTOR COMPRISING A PLURALITY OF GENERALLY V-SHAPED CONNECTOR ELEMENTS, EACH OF SAID ELEMENTS HAVING TWO SHANKS LYING SUBSTANTIALLY IN A COMMON PLANE, ONE SHANK OF EACH ELEMENT TERMINATING IN A PRONG EXTENDING INWARDLY TOWARDS THE OTHER SHANK AND SUBSTANTIALLY LYING IN SAID COMMON PLANE AND SAID OTHER SHANK HAVING AN INNER PORTION LYING WITHIN SAID PLANE, AN INTERMEDIATE PORTION EXTENDING OUT OF SAID PLANE AND AN OUTER PORTION LYING PARALLEL TO SAID PLANE BUT SPACED APART THEREFROM AND TERMINATING IN A BRIDGE PORTION EXTENDING TOWARD SAID PLANE AND ENDING SUBSTANTIALLY WITHIN THE SAME, THE PRONGED SHANKS OF SAID ELEMENTS BEING DISPOSED SIDE BY SIDE IN PARALLEL PLANES AND THE INTERMEDIATE AND OUTER SHANK PORTIONS OF THE OTHER SHANK OF EACH ELEMENT BEING DISPOSED ON THE SAME SIDE OF SAID PLANES WHEREBY SAID BRIDGE PORTIONS ALL FACE IN THE SAME DIRECTION AND DEFINE A SUBSTANTIALLY STRAIGHT CONTINUOUS LINE TRANSVERSE OF SAID PLANES. 